CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 509	$ 229	$ 560
Other comprehensive income (loss):
Foreign currency translation adjustments	(10)	4	(28)
Defined benefit obligations:
Defined benefit obligation adjustments	25	(7)	(12)
Reclassification adjustments related to defined benefit obligations	1	2	0
Income tax effect	(10)	2	4
Unrealized gains (losses) on available-for-sale securities:
Unrealized holding gains (losses) arising during the period	(6)	(4)	2
Reclassification adjustments for gains included in net income	0	(1)	0
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) arising during the period	8	(4)	15
Reclassification adjustments for (gains) losses included in net income	(6)	1	(14)
Other comprehensive income (loss):	2	(7)	(33)
Comprehensive income	$ 511	$ 222	$ 527